european college of sport science

Thursday, June 25th, 2009
in identifying young swimmers at risk of NFOR, but measures of cortisol, IgA or URTI incidence rates have limited confirmatory use. Nonfunctional
overreaching in children is a complex phenomenon and requires more research into the underlying causes for the development
of applied diagnostic tools.
Matos & Winsley, 2007. J Sp Sci Med, 6:353-367.
Meuusen et al., 2006. Eur J Sp Med, 6:1-14.
Mujika et al., 1995. Can J Sp Sci, 20 (4),395-406.
Raglin & Morgan, 1994. Int J Sp Med, 15: 84-8.
EFFECTS OF TAE-BO EXERCISE PROGRAM ON BLOOD MARKERS OF OXIDATIVE STRESS IN YOUNG WOMEN
STOJILJKOVIC, N., RADOVANOVIC, D., VESELINOVIC, N., IGNJATOVIC, A.
1. FACULTY OF SPORT AND PHYSICAL EDUCATION, UNIVERSITY OF NIS, SERBIA, 2. FACULTY OF PEDAGOGY JAGODINA, UNIVERSITY OF KRA-
GUJEVAC, SERBIA
Introduction: Strenuous physical exercise characterized by a remarkable increase in oxygen consumption with concomitant production of
ROS presents a challenge to the antioxidant systems (Radovanovic et al., 2004). The risk of oxidative stress with exercise depends on
exercise intensity and the participant’s state of training (Alessio et al., 2000). This study examined the effects of 10 weeks tae-bo training
on selected markers of oxidative stress in young women.
Methods: Blood samples were collected from seven women (mean+/-SD: age 26.8+/-4.3 years, body height 1.65+/-6.7 m, body weight
58.4+/-9.8 kg, body fat 15.1+/-6.4%) who performed tae-bo training as high-intensity aerobic exercise. The experimental program was
consisted from three training sessions every week. This made total of 30 training sessions. Each training session lasted one hour. After
the warm-up the main part of the training was consisted from the combination of tae-bo exercises. The choreographies were made from
next tae-bo basic moves: jab, hook, cross, upper-cut, kick (front, side and back). Cross train with other forms of exercise such as walking,
jogging, knee up, leg curls, step touch, etc. Intensity in the main part of training is adjusting to held heart rate frequency (HRF) in range
between 60-85% of maximal HRF. Samples were analyzed for lipid peroxidation byproduct malondialdehyde-MDA, enzyme catalase-
CAT, reactive carbonyl derivates, total sulfhydryl groups-TSHG and total antioxidant status–TAS (Sachdev and Davies, 2008). Blood markers
of oxidative stress were determined by standardized spectrophotometry techniques.
Results: An important finding in present investigation is that TAS increased significantly after 10 weeks tae-bo training (median 78.2% pre
vs. 82.4% post, p0.05), erythrocyte
MDA (median 13.6 µmol.L-1 pre vs. 13.63 µmol.L-1 post, p>0.05), TSHG (median 229.7 mM.L-1 pre vs. 219.18 mM.L-1 post, p>0.05), reactive
carbonyl derivates (median 1.31 µM.g-1 of proteins pre vs. 0.91 µM.g-1 of proteins post, p>0.05).
Discussion: This data suggest that 10 weeks tae-bo exercise training increase serum total antioxidant status. Also, it can be concluded
that tae-bo training program did not have other effects on oxidative stress levels in young women.
References
Alessio HM, Hagerman AE, Fulkerson BK, et al. (2000). Med Sci Sports Exerc, 32(9), 1576-1581.
Radovanovic D, Rankovic G. (2004). Acta Med Medianae, 43(4), 45-48.
Sachdev S, Davies KJ. (2008). Free Radic Biol Med, 44(2), 215-223.
SEASONAL VARIATION IN PHYSICAL FITNESS AND FUNCTIONAL PARAMETERS OF PROFESSIONAL ELITE SOCCER PLAY-
ERS
SILVA, J., MAGALHÃES, J., ASCENSÃO, A., SEABRA, A., REBELO, A.
FACULTY OF SPORT, UNIVERSITY OF PORTO
Introduction: Soccer player must be able to perform more than 50 matches over competitive seasons of around 11 months. This high
number of competitions in addition to systematic training may impose considerable physiological strain and fatigue to soccer players
possibly affecting physical performance over the season. However, the variation of a large group of physical fitness and functional parameters
of professional soccer players throughout the entire season has never been assessed, being the purpose of this study.
Methods: Twenty-two Portuguese elite professional soccer players were evaluated in four occasions throughout the season [prior preseason
(PPS), end pre-season (EPS), mid-season (MID) and end-of-season (EOS)] for counter-movement jump (CMJ), sprint (5 and 30m)
agility (T-test), maximal concentric isokinetic knee extensor (KE) and flexor (KF) strength (90ºs-1), and intermittent endurance performance
(YYIET2; no YYIET2 data were collected in MID due to the Club match commitments).
Results: Improvements in 30m sprint test were observed in MID vs. EPS (p